truck drivers use chains as precaution. some don't think the rule was necessary. >> it was no problem at all. a few icy spots, i think maybe it might have been worse earlier. >> the weather expected to get warmer today and melt that off. my question for you is, has it snowed in october here in maryland? >> yesterday the anniversary of a trace of snow in 1977, october 10th, remember the world series starting off with snow. 1979, officially. that was 3/10th in baltimore. more outside the city. we want to talk snow. we got to talk about tropics. looks like it lost the potential because the surface low pressure here, all the moisture pulled off to the east, a lot of sheer. upper level winds, see the pull now to the north. that is important because that's a sign of this system, the same one that brought the haboob that dust storm to texas, now helping to draw all this moisture ahead of it. you can see the circulation here, trailing cold front, louisiana and arkansas, helping to pull this moisture, this weave of pressure, the ini